/Engine/Plugins/Experimental/Mutable/Source/CustomizableObject/Public/MuCO/CustomizableObjectInstanceDescriptor.h
SeeFMultilayerProjector::UpdateVirtualLayer.
void MultilayerProjectorUpdateVirtualLayer ( const [FName](API\Runtime\Core\UObject\FName) & ProjectorParamName, const [FName](API\Runtime\Core\UObject\FName) & Id, const [FMultilayerProjectorVirtualLayer](API\Plugins\CustomizableObject\MuCO\FMultilayerProjectorVirtualLayer) & Layer )